Waste Water Industry
Concrete Attack
Concrete structures in the dirty water sector are exposed to demanding conditions with chemical attack from raw sewage, exacerbated by abrasion from solids in the effluent, being just one of them. However it is the bacterial activity in the sewage that causes the most significant problems due to the evolution of hydrogen sulphide (H2S) gas. In enclosed structures, this dissolves in the condensation on surfaces to form sulphuric acid which readily attacks the concrete and significantly reduces the service life of structures.
Corrosion Protection
Our range includes rapid setting, high early strength mortars and water-based cementitious polymer and epoxy modified coatings, which can be applied in damp environments without primers. Suitable for both concrete and steel, the coatings cure to form a waterproof, protective layer with chemical resistance to H2S and sulphuric acid. As our products are water-based and low odour with no hazardous solvents released during application, they can be safely applied when facilities are still in normal operation.
Steel or cast iron in dirty water structures is highly susceptible to corrosion. Flexcrete offers the ideal solution for the protection of ferrous metals with our water-based cementititious and epoxy modified polymer coatings. Cemprotec E942 is applied directly, even onto metal in damp conditions, with minimal surface preparation and cures to form a dense, protective barrier. High alkalinity accelerates the re-passivation of the steel to afford long-term corrosion protection.
Dirty Water Applications
Our products are suitable for the repair and protection of countless structures in the dirty water industry, including those below. They significantly extend durability of structures and enable the original design life to be achieved.
- Aeration tanks
- Digester tanks
- Filter plants
- Final filtration tanks
- Flume channels
- Humus tanks
- Primary settlement tanks
- Sludge tanks
- Spillways
- Storm water tanks
- Support chambers
- Weirs
Waste Water Industry Problems and Solutions